Caul bramming



C. BRAMMING Dec. 9, 1930. CCCCCRCC CWCCCC Re. 11,897

Originai Filed llnrch 1, 1928 12113. 1 E l. L Flq. 3

9 'CC/f VM/m/ A TTORNEYS.

Reissued Dec. 9, 1930 UNITED STATES PATENT OFFICE CARL BRAMMING, or CHICAGO, ILLINOIS, AssI-GNOR To DELTA ELECTRIC COMPANY,

or MARION, INDIANA, A CORPORATION ELECTRIC SWTI'ICHIl y Original No. 1,740,535, dat'edrDecember 24, 1929, Serial No. 258,271,1i1ed March 1, 1928. Application 'for reissue filed October 20, 1930. Seria1No.r490,041.'

23. The handlev 12 is secured to the carriage l This invention relates to a double throw, one or two pole electric switch. l

The principal object of this invention is to provide a switch of this character with a ball bearing slide, and recess for engaging With the ball bearing for checking the operation of theswitch at the neutral point. By means of this arrangement, a more` positive switch action is Obtained, and it is 'given greater life by reason of the anti-frictional relationship of the sliding member and base.

The full nature of the invention will be more clearly understood from the accompanying drawings and the following description and claims:

Fig. 1 is a front elevation ofthe switch;

Fig. 2 is a side elevation thereof;

Fig. 3 is a rear elevation; Y

Fig. 4 is a section takeneon the line 4 4 of Fig. 3 showing the switch in neutral position; f

Fig. 5 is a section taken on the line 5-5 of Fig. 1 with the switch in neutral position;

Fig. 6 is the same as Fig. 4 with the switch in contacting position.

ln the drawings, there is shown a switch having a face plate 10 provided with a lon gitudinal slot 11 in which the switch operating handle 12 is adapted to slide. Face plate 10 is provided with turned up sides 13 provided with clamps 14 for securing therebetween the contact supporting plate 15 formed of insulating material. Mounted in the plate 15 there are three connecting sockets 16, 17 and 18 provided with screws 19 for securing wire leads into the recesses formed therein.

Slidably mounted within the closure formed by the face plate, its sides 13 and the supporting plate 15, as well as the ends 2O formed from the sides 13, there is a contact f the contact strip 27, said ends being bent inwardly toward each other as illustrated. Said strip is provided with downwardly eX- tending ears 28 adapted to project in theirl corresponding recesses 24 so as to cause the contact members to be carried by the block 2l so that uponsliding said handle longitudinally of the slot 11, it will cause said carriage Yas well as the block 23 and contactors to slide longitudinally with respect tothe supporting plate 15.

The face plate 10 is provided with an opening or indentation therein as indicated at 29 in which the ball 30 is adapted to seat when brought into engagement therewith. Said ball is held in position by a suitable recess 31 formed in the carriage 21 so as to bear against the under surface of block 23. By this arrangement, when the carriagev is moved'from one position to another, the block 23 is slightly raised against the springtension of the contactor, thus increasing the pressure between the contacting ends and 26 thereof and their corresponding connector sockets, as illustrated in Fig. 6.` When the switch is moved to neutral position as shown in Fig. 5, the ball finds its seat in the hole 30 of the face plate, and is held therein by the tension of the contacter. Thus the movement of the switch is limitedby the end ofthe slot 11 when in contacting position, and is held in its intermediate position by the engagement of the ball Vwith the opening when in neutral position.' It will be notedV that the surface intermediate the recesses 32 of the connecting sockets is relatively smooth to permit'free sliding action of the contactor ends 25 and 26 from one socketY to thev other.'

The invention claimed is: Y y

A1. A switch ofthe character described, comprising a housing, a plurality of Contact members mounted thereon, spring contactors adaptedV to engage and make contact therewith, 'a carriage for supporting said' spring contactors, said carriage having an opening therein, a support upon which said carriage is adapted to slide havinga recess therein-and aball bearing adapted to ride within the opening ofsaid carriageA in position to registerA withthe recess in said support for resiliently holding said carriage in predetermined-position under the spring tension of said spring contactors. "2. A` switchof the character described, comprisingarhousing having arplurality of contact members, a carriage slidably mounted in said housing having a pair of spring contact-ors mounted thereon in position to yieldingly -make contact with said members when in one position and be out.. et. Contact therewith when in a neutral and means associated with said carriage for maintaining itV in'position under springv tension when in neutral position, permitting itv to be moved under increased spring tensioninto contacting position. s

3. A switch of the character described, comprising a housing having a plurality of4 contact members, a. carriageslidably mounted in said housing having a pairmof spring contactors mounted thereon in" position to yieldingly. make-contact with saidr members wheny if'nk one.y position and be out of Contact therewith when inaneutralpositifor, afrecess fermed'in, said housing,` anda ball bearing mounted in said carriageI adapted to drop intesa-id recessunden 4tensioni of said; spring contactera. when moved toV neutral position, and, Abe* forcedpouty of said recessagainst the sparing tension ofthe spring contactors for increasing the; contacting: pressurethereof When moved into contacting positionm 4 Av switch of thel character described camprising a;y hor-rising a plurality ort. contact Hmembers,mounted thereon, yielding spring contactera adaptedto engage andv inake contactztherewith, a block. carried by saidy contaeters and` resiliently held. in spaced relation from said Contact members by resi-lient aictiionl thereomav carriage whichsaid block Inova-bly mounted with respect, to saidV con-- tant-members, said carriage having? an open*- t-herein, av face" plate with respect to which said-carriageand' blocliv areadapted to slide having' a. recess therein, a; balllbear.-

adapted to' ride within the@ opening of said carriage inl position to` register'with. the recess in jsaid pla-,te when said carri-age is movedto. one`A position for interlbckingjsaid carriage and. plate, andk upon said carriage being, moved to another posi-tien said' ball will disengagethefreeess in saidplate for spacing contact members embedded in the base and having concave ends flush with the inner surface of the base, a yieldable circuit closer adapted to close one circuit between adjacent contacts. at one end ofV the switchthrow, and another circuit between. adjacent contacts at the other end of the throw, and means for holding the switch in neutral position permitting it to-,be'moved-under' increased spring pressure.

7.. In. a switch of the class described, an insulator base, a plurality of contacts embedded in. the base'in :longitudinal alinement, the inner ends of. thecontacts being conca-ve and flush with the base, a carriage slidable along theE base, a spring contactorl mounted on the carriage and adapted to close a circuit; between two or more contacts, and means associated with said carriage for maintainingfit-iln positionv under spring tension when neutral position permitting it tobe moved runder` increased spring tension into contact position.. f

8. Arthreeepole switch of the character descri-bed, comprising a housing having three contactv members inl longitudinal` alinement, acarriage slidably mounted in said housing having a pair of spring contactors mounted thereon in. position to yieldably make contact with two of said members' whenl inone position and to be out of contact therewith when Yin neutral position, and means associated with'said carriage for maintaining it in position-under springtension when in neutral position, permitting it to-be moved under increased spring tension into contact posi- 'tionT In testimony whereof I affixmy signature.

CARL BRAMMING.

said block againstthe-tenslon. of said contactors from said.- carriage and therebyl acting' as a frictionless bearingintermediate g said block andfplate.

GDE

v 5a A. three pole,4 switch oi the-A class-v described, compri-sing an elongated base' of in sulating materiah, three contact n iernbers,err-1:,

. bedded inthe baseeachpresentingalconcave contacting surface Hush, therewith, a carri age adapted to slidealong thebasefove'rz the three contacts, a yieldable contacter carried by the carriage and. engageablewith adjacent con tacts,y and means `associated with. the carri-agefor holding-` the.- switch in neutral' position and permitting it to be moved. onlyundier increased spring pressure GJA- three pole switch of theolass de-v scribed comprising an insulator .ha-se, three. 

